ICAT included 48 photos, 12 in each of the following categories: Jewish victim, Jewish non-victim, non-Jewish and non-Jewish non-victim.
In each trial, one photo was presented for 6 seconds, and then participants were instructed to decide whether it belongs to category A or B. If the photo displayed a visible victim and the participant selected category A or the photo did not display a victim and the participant selected B, they receive the feedback “Correct”. Otherwise, they receive the feedback “Wrong”.
The task ended either when the participant responded correctly on 10 consecutive trials or when they went through all the photos twice (96 trials). The indicator of VCA was the number of trials required to learn the decision rule, with low ICAT scores indicating high VCA and vice versa.